Mineralogy Database

Mourite Mineral Data

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General Mourite Information

Help on Chemical  Formula: Chemical Formula: U++++Mo++++++5O12(OH)10
Help on Composition: Composition: Molecular Weight = 1,079.80 gm
   Uranium     22.04 %  U    25.01 % UO2
   Molybdenum  44.43 %  Mo   66.65 % MoO3
   Hydrogen     0.93 %  H     8.34 % H2O
   Oxygen      32.60 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: UMo5O12(OH)10
Help on Environment: Environment: U-Mo deposits.
Help on IMA Status: IMA Status: Approved IMA 1962
Help on Locality: Locality: Unspecified location in Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its composition (Mo, Uranium).
Help on Name Pronunciation: Name Pronunciation: Mourite Say MOURITE
 

Mourite Image

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  Mourite   Iriginite

Comments: Purple to violet sub-metallic mourite coatings with yellow iriginite.
Location: 'North Caucasus', probably Kyzylsai Deposit, Chu-Ili Mountains, Balkhash, Zezkazgan, Kazakhstan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Mourite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.4033:1:1.3785
Help on Cell Dimensions: Cell Dimensions: a = 24.443, b = 7.182, c = 9.901, Z = 4; beta = 102.22° V = 1,698.73 Den(Calc)= 4.22
Help on Crystal System: Crystal System: Monoclinic Space Group: Pc or P 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.897(1), 12.77(0.9), 2.871(0.8),
 

Physical Properties of Mourite

Help on Cleavage: Cleavage: {100} Good
Help on Color: Color: Violet.
Help on Density: Density: 4.17 - 4.29, Average = 4.23
Help on Habit: Habit: Fan Shaped - Occurs as radiating crystals shaped like a fan.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Adamantine
Help on Streak: Streak: blue violet
 

Optical Properties of Mourite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.116 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.114 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1872,KPDmeas= 0.1868,KC= 0.2113
Ncalc = 1.88 - 1.91
Help on Optical Data: Optical Data: Biaxial (?), a=1.79
Help on Pleochroism (x): Pleochroism (x): pale greenish violet.
Help on Pleochroism (z): Pleochroism (z): dark blue violet.
 

Calculated Properties of Mourite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.81 gm/cc
note: Specific Gravity of Mourite =4.22 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.11
Boson Index = 0.89
Help on Photoelectric: Photoelectric: PEMourite = 628.50 barns/electron
U=PEMourite x relectron=2,397.34 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 1,698,363.06 (Gamma Ray American Petroleum Institute Units)
Concentration of Mourite per GRapi unit = 588.80 (PPB)

Mourite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 10 cm box) 17.91 ± 4.48 grams of pure Mourite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1790.9 ±447.74 grams of pure Mourite .

Estimated Radioactivity from Mourite - very strong
Specimen
Size
Weight/Volume
(Sphere)
*
Calculated
Activity
Bequerols
(Bq)
Calculated
Activity
Curies (Ci)
Estimated
Activity
GR(api)
Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 7.68 cm 39,458,572 1.07E-03 1,698,363.06 558.37
100 gm / 3.56 cm 3,945,857 1.07E-04 169,836.31 55.84
10 gm / 1.65 cm 394,586 1.07E-05 16,983.63 5.58
1 gm / 7.68 mm 39,459 1.07E-06 1,698.36 0.56
0.1 gm / 3.56 mm 3,946 1.07E-07 169.84 0.06
0.01 gm / 1.65 mm 395 1.07E-08 16.98 0.01
0.001 gm / 0.77 mm 39 1.07E-09 1.70 0.00

Weight of pure Mourite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.22 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
 

Mourite Classification

Help on  Dana Class: Dana Class: 05.09.04.01 (05)Oxides Containing Uranium and Thorium
  (05.09)with a cation charge of 6+ containing Pb or Bi and some water of hydration or hydroxyl
  (05.09.04)Dana Group
 
05.09.04.01 Mourite UMo5O12(OH)10 Pc or P 2/c Mono
Help on  Strunz Class: Strunz Class: 04.FL.80 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.F - Hydroxides (without V or U)
  04.FL -Hydroxides with H2O � (OH); sheets of edge-sharing octahedra
 
04.FL.80 Mourite UMo5O12(OH)10 Pc or P 2/c Mono
 

Other Mourite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Mourite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Uranium Minerals

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Print or Cut-and-Paste your Mourite Specimen Label here :

Mourite

U++++Mo++++++5O12(OH)10
Dana No: 05.09.04.01 Strunz No: 04.FL.80
Locality:

 

Notes:

 

 
   
 


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